Typewriting machine



um@ 9 W3., W. s. LEMMON TYPEWRITNG MACHINE Filed Nov. 24, 1954 ATT RNEYINVENToR. b1/6g f 1 BY v Patented 9, 1

I UNITED STATES PlvrisN'rC OFFICE i claim. (ci. loiLeol This inventionrelates to automatically operated typewriting machines, and theprincipal ob- ,ject of the invention is the provision of simple andinexpensive means for selectively controlling theopei'ations of themachine by means of an indicia record control means, or manually fromthe key board in the usual manner.

In this disclosureof the present invention for purposes of illustrating.the principle of operation one type of indicia record control means willbeembodied, and which is in part in the form of an tape, sheet, orribbon on which characters or other indicia to be reproduced arerepresented by perforations to selectively operate the associatedtranslating mechanism, one form of which as shown may be a conventionalpower operated typewriter.

It is an object of the present inventionto provide sensing means tocooperate with the indicia record control means in such a manner thatwhen a particular f orm of indicia is sensed, a circuit corresponding tothe said indicia is energized to further control the associatedtranslating mechanism. Y

Further and other objects of the present invention will behereinafterset forth in the accompanying specification and claim andshown in the drawing which by way of illustration is what I no wconsider to be the best mode in which I have contemplated applying thatprinciple. Other embodiments of the invention employing' vthe same orequivalent principle may be used and structural changes made as desiredby those skilled in the art without departing from the present inventionvand within the spirit of the appended claim.

In the drawing: Y

Fig. 1 shows a transverse sectional view of so much of a typewritingmachine as is necessary to illustrate a preferred embodiment of theinventlon. l

Fig. 2 shows a diagrammatic circuit diagram illustrating the preferredembodiment of the invention.

Typewriter mechanism Referring now to Fig. 1, in the embodimentillustrated in the drawing, well known means are provided for actuatingthe type bars by power operated devices comprising a power driven rollerIii.

A cam ii is pivoted on one arm of a bell crank lever l2 pivoted in theframe, the other arm oi which is operatively connected with one arm of abell crank lever il by means of link Il. The

monV rod 2B and linked to the solenoid i8. It is erated thereby. Theengagement of the cam ll with the power roller is controlledautomatically by means of the solenoid i8 connectedfto the key bar Il bylink i9. The cam il is resiliently engaged by a spring-pressed arm whichtends to turn it into engagement with the power driven roller or a stop2i on a lever 22 pivoted on the bell crank I2 and normally arranged inthe path oi a lug 23 on the cam.

When the lever 22 swings to move its stop out of the path of the lug,the arm 20 swings the cam into engagement with the power roller to .beactuated thereby to swing the bell crank i2 to actuate its connectedmechanism. The lever 22 has an arm 24 which is provided with an oilsetprojection 25 at its end which projects laterally through an opening inthe bell crank I2 and engages the bifurcated lower end 26 of an arm 21of a key lever` i'l pivoted on the comobvious then that energization ofsolenoid I8 in causing a key lever I1 to be depressed releases therevolubly mounted cam Il to engage and be actuated by power roller Il inturn operating bell crank I2 and its attached links to cause theassociated mechanism such as the key bars or case shift mechanism to beoperated.

It will be understood that the usual number of type bars and associateddevices for' operating them may be employed, although only one of themis illustrated herein for the sake of clearness. 40

Sensing mechanism Itwas mentioned that automatic controlling means forselective operation of the typewriter is provided which in the preferredform is shown as va master sheet or roll Il on which characters or otherindicia't be translated into typewriting `are represented'byperforations 3i (Fig. 2).

The perforations are formed by any suitable means and are provided on asheet or roll wide enough to contain a longitudinal series ofperforations, evenly spaced. forthe control of each element of themachine to be operated, namely the solenoids Il of the typewriter.

A sensing mechanism is provided to cooperate.

when a particular perforation is sensed, a circuit corresponding to therepresented character is energized to control the typewriteraccordingly. The following brief description is sufficient since a morecomplete disclosure of the sensing device is made in my copendingapplication Serial No. 743,208, flied September 8, 1934, and which asshown is provided with a horizontal transverse conducting roller 32which supports and feeds the elongated perforated sheet 33. A pluralityof sensing brushes 33 are positioned so as to enable them to cooperatewith the feed roller 32 when a perforation is sensed. 'Ihe sheet 30 iswide enough to contain a longitudinal series of evenly spacedperforations, the position of a single perforation on the sheetindicating the particular character representation. 'Ihere are providedas many brushes 33 as there are perforation positions, that is, anindividual brush for each perforation which-is representative of acharacter or other indicia.

Therefore when the sheet is fed continuously to the sensing device'bysuitable means, such as motor 34, and when the particular brush 33senses its corresponding character perforation a controlling circuitwill be completed to control` the operation of the typewriter which willbe described hereinafter.

Case shift mechanism It is necessary to note at this time the provisionmade for operation of the carriage shift key of the typewriter. In orderto record both upper and lower cases, it is obvious that the shift keymust remain in its designated or predetermined position for that periodduring which the corresponding type of recording is desired; forexample, as is usually the method, when upper case is desired the shiftkey must remain depressed for that particular perior of upper casetyping. 'I'he following is what is now considered the preferred methodof effecting this procedure. The carriage shift sensing brush 33a uponengaging a perforation in roll 30 indicating -a desired shift oftypecase causes energization of magnet 40 to cause the cam wheel to berotated so that its high surface forces contact blade 42 into engagementwith contact 43, which is fully described in my copending applicationSerial No. 746,489, filed October 2, 1934, keeping said contacts closedto effect a carriage shift which operation will be explainedhereinafter. 7

The carriage shift mechanism remains in the operated position so long ascontacts 42 and 43 are closed. Upon reception of another impulseenergizing magnet 40 cam wheel 4I is stepped ahead to permit contactblade 42 to engage a lower surface of the cam wheel to disengage thecontacts 42 and 43, thereby restoring the carriage shift mechanism toits normal printing position. Since ratchet 44 is provided with twotimes the number of teeth as there are highV surfaces on cam wheel 4I,it is obvious that a single operation of magnet 43 will cause contacts42 and 43 to close and a second energization of the magnet will permitthem to resume the position they occupy in the figure.

Operation Upon closure of the switch 35, motor 34 is energized by thecircuitincluding grounded battery 36, to rotate the feed roller 32 whichis adapted 'to introduce the perforated sheet 30 between the brushes andconduct/ing roller 32. The individua-1 with the perforated sheet in sucha manner that brushes 33 are connected to separate solenoids I3 and asmentionel hereinbefore adapted to sense a particular perforation columnor position all of which represent the same corresponding character,that is the separate brush, its connected solenoid and the correspondingperforation column adapted to be sensed. Individual brushes 33 and theconnected solenoids I3 and perforation positions are provided for eachcharacter representai tion.

Therefore the brushes 33 upon sensing the particular correspondingperforations 3l engage conducting roller 32 to complete circuits wherebycurrent from grounded battery energizes solenoids I3 through contacts 45closed at each sensing operation, by virtue of the grounded commoncontact 31 adapted to engage the roller 32 con tinuously.

Energization of solenpid I8 causes its corresponding key lever I1 to bedepressed to release the cam II and then actuated by power roller III torotate the cam a half revolution which causes the bell crank lever I2 tooperate its connected type bar, recording the character represented bythe sensed perforation on sheet 30.

A cam wheel 43 is shown fixed on the conducting roller shaft, thepurpose of which is to cut off the current from battery 36 to thesolenoids I3 whenever a perforation isvsensed and before the edge of theperforation is reached by the sensing brush. Instead of deenergizing theenergized solenoids I3 when the brushes 33 leave the perforation and areseparated from the conducting roll 32 by the perforated sheet 30, thecam wheel 43 is adapted to break the contacts 45 before the brushes 33are disengaged from the conducting roll by the said sheet. 1

The cam wheel 43 is preferably an insulated member similar to cam wheel4I and adapted to have its lower surfaces 41 so arranged on itsperiphery that when rotated synchronously with feed roll 32 by motor 34they permit the contacts 43 to be engaged at the same moment the brushes33 sense their particular perforations. It was mentioned hereinbeforethat the perforations 3| are evenly spaced so that the camming surfacescan be so positioned to be in synchronism with the sensing of theperforations. Before the brushes 33 disengage from the conducting roll32 or in other words before the perforations are advanced to separatethe brushes from the conducting roll, the high surfaces on the cam'wheel43 open the contacts'to break the established circuit 'from groundedcontact 31, conducting roll 32,

. brush 33, solenoid I3, contacts 41 to grounded battery 33,deenergizing the said solenoid.

yfrom grounded battery 38 to energize solenoid Ila which is connected totheshift key of the typewriter. The key shift solenoid remains energizeduntil another shift perforation is sensed to energize magnet 40, andobviously maintains .the shift key depressed to render the typewritershift mechanism operative until the second energization of magnet 40 todisengage the contacts 42 and 43 to deenergize solenoid Na restoring theshift mechanism to normal position.

lt is obvious that any number of typewriters can be operated at one timeby having the corresponding solenoids of the additional machinesconnected, for example, in multiple to the cor- `responding circuitsconnected to the sensing brushes as shown in-the vvdotted section in theI yfigure.

The operation of the control or master roll 30 is controlled by means ofa manually operated switch 35 so thatits operation may be stopped whendesired, and the machine operated manually when any insertion oradditional matter is to ,be recorded. During such operation the bellcrank substitutions and changes in the form and detalls of the deviceillustrated and in itsoperation mayr be madej by those skilled in theart without departing from the spirit of the invention. It4 is. theintention therefore to be limited only asindicated by the scope of thefollowing claim.

What is claimed is as follows: y

In a typewriting machine comprising a case shift instrumentality,control means therefor and connected thereto, the combination of aperfov rated record control sheet, sensing means com-` prisingindividual brushes cooperating therewith.

electromagnetic means controlled by one of said` l sensing brushes andadapted to control the operation of said instrumentality control means,and means comprising cam controlled contacts connected to saidinstrumentality control means to render said instrumentality operativeand inoperative upon successive energization of said 20 electromagneticmeans.

' WALTER'S. LEMMON;

